03/04 Cobra Terminator Lower Manifold Porting

When pushing your 4.6 based Terminator beyond 700hp the lower manifold becomes a issue. We have tested with some of the premier 03/04 cobra racers In the country to back up our claims. Racer Bryan Crane tested our porting and gains seen were +31hp at the 1000rwhp mark on his Whipple charged blower combo. This mod is not necessary for cars producing below 700hp.